Condensed Consolidated Statements of Stockholders' Equity Statement - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Treasury Stock [Member]	Accumulated Other comprehensive Income (Loss) [Member]
Common stock, shares, outstanding		109,910
Total Stockholders' Equity	$ 286,517	$ 1,099	$ 838,436	$ 805,924	$ (1,347,677)	$ (11,265)
Net earnings (loss)	7,323	0	0	7,323	0	0
Foreign currency translation adjustments, net of tax of $138 and $438 for the three months ended 2019 and 2018, respectively	521	$ 0	0	0	0	521
Exercise of stock options, shares		284
Exercise of stock options	2,892	$ 3	2,889	0	0	0
Vesting of restricted share units, shares		218
Vesting of restricted share units	0	$ 2	(2)	0	0	0
Shares withheld for employee taxes on awards vested & exercised	(1,734)	0	(1,734)	0	0	0
Stock-based compensation	709	$ 0	709	0	0	0
Common stock, shares, outstanding		110,412
Total Stockholders' Equity	294,252	$ 1,104	840,298	811,271	(1,347,677)	(10,744)
ASC 842 adoption	$ (1,976)	$ 0	$ 0	$ (1,976)	$ 0	$ 0